Segment Information - Schedule of Reconciliation of Segment Operating Results to HP Consolidated Results (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2024	Apr. 30, 2023
Net revenue:
Total net revenue	$ 12,800	$ 12,907	$ 25,985	$ 26,705
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	952	747	1,887	1,490
Restructuring and other charges	(71)	(200)	(134)	(341)
Acquisition and divestiture charges	(22)	(74)	(49)	(158)
Amortization of intangible assets	(80)	(86)	(161)	(171)
Interest and other, net	(155)	(160)	(297)	(341)
Earnings before taxes	797	587	1,590	1,149
Operating Segments
Net revenue:
Total net revenue	12,799	12,908	25,985	26,706
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	1,307	1,292	2,679	2,604
Other
Net revenue:
Total net revenue	1	(1)	0	(1)
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Stock-based compensation expense	(94)	(95)	(271)	(262)
Restructuring and other charges	(71)	(200)	(134)	(341)
Acquisition and divestiture charges	(22)	(74)	(49)	(158)
Amortization of intangible assets	(80)	(86)	(161)	(171)
Interest and other, net	(155)	(160)	(297)	(341)
Corporate and unallocated costs and other
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Corporate and unallocated costs and other	(88)	(90)	(177)	(182)
Personal Systems | Operating Segments
Net revenue:
Total net revenue	8,426	8,169	17,235	17,354
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	508	431	1,045	906
Printing | Operating Segments
Net revenue:
Total net revenue	4,368	4,736	8,743	9,348
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	829	899	1,701	1,769
Corporate Investments | Operating Segments
Net revenue:
Total net revenue	5	3	7	4
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total segment earnings from operations	(30)	(38)	(67)	(71)
Commercial PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	6,242	5,916	12,287	12,298
Consumer PS | Personal Systems | Operating Segments
Net revenue:
Total net revenue	2,184	2,253	4,948	5,056
Supplies | Printing | Operating Segments
Net revenue:
Total net revenue	2,864	3,006	5,727	5,863
Commercial Printing | Printing | Operating Segments
Net revenue:
Total net revenue	1,205	1,373	2,432	2,761
Consumer Printing | Printing | Operating Segments
Net revenue:
Total net revenue	$ 299	$ 357	$ 584	$ 724